Smart Living Supermoon: What is it and when can you see it? Updated : February 19, 2019 07:54 PM IST The word “supermoon” was coined in 1979 and is often used today to describe what astronomers would call a perigean (pear-ih-jee-un) full moon. To witness the supermoon, one must look towards the east as the sun sets in the west. Subscribe to Moneycontrol PRO at just Rs.33/- per month for the first year. Use code SUPERPRO. Limited period offer. Available on Web and Android.